msm_serial_hs_ti: Bring up-to-date with msm_serial_hs

Now that we know the differences between the TI & the generic driver,
updating is much easier

Conflicts:
	arch/arm/mach-msm/include/mach/msm_serial_hs.h

Change-Id: I243c8deda9745afb012ed5b1315f0fab8b609349